title: International collaborative study of single-radial-diffusion and immunoelectrophoresis techniques for the assay of haemagglutinin antigen of influenza virus.
mesh_terms: D000956:Antigens, Viral / Q000032:analysis; D005069:Evaluation Studies as Topic; D005612:Freeze Drying; D006389:Hemagglutinins, Viral / Q000032:analysis*; D005779:Immunodiffusion; D007122:Immunoelectrophoresis / Q000379:methods*; D009975:Orthomyxoviridae / Q000276:immunology*
chemical_list: D000956:Antigens, Viral; D006389:Hemagglutinins, Viral